|25||£0.09||Up to £2.25|
|50||£0.14||Up to £7.00|
As used on the TrafficHAT and been commented as "The best buzzers we've brought".
We find they work great with Raspberry Pi's when using a 82 Ohm Resistor. We'd recommend a 330 Ohm resistor for 5V Devices such as Arduinos.
As they're active they're either on or off and controlled via a DC power source.